Reverse Slippery Slope Fallacy

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Arguing that because a slippery slope has failed to appear, further travel down the slope is safe. Note that such arguments can actually legitimize a Slippery Slope Fallacy; the speaker has established a precedent of using previous travel down the slope to justify further travel down the slope; thus, one is justified in worrying that this new action will in turn be used to justify even more actions.

Examples:

As mentioned on the Slippery Slope Fallacy page, smoking one cigarette will not kill you or give you cancer. Nor will smoking a second cigarette. But that does not mean you should go for the third cigarette — the addiction and habit will kick in shortly.

When one violation of the separation of the Church and State is criticized as bad, another violation from recent history is cited.

Why shouldn't we put the Ten Commandments up at the courthouse? After all, as this dollar bill states "In God we trust".

This is despite the phrase being made official in 1956, in a violation of separation of church and state (replacing "E Pluribus Unum").

In Sicko, Michael Moore tries to allay worries about government-operated healthcare by pointing out that America has already implemented government-operated schools and a government-operated mail service.

You might say that this part of the slope has already been traveled in the abundance of countries which already have government-operated healthcare, but although that is relevant to the government healthcare argument it is not relevant to the question of whether Michael Moore himself committed the fallacy.

Looks like this fallacy but is not:

One can make valid arguments that the failure of dangers to appear from similar circumstances should make us more confident in the safety of the new circumstances. But it can't be used to establish that the new circumstances will definitely be safe, especially if existing concerns about the current circumstances are ignored.

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